The answer is 41 degrees
180 - 139 degrees = 41 degrees
Answer:
y=5x
Step-by-step explanation:
Answer:
d
Step-by-step explanation:
So the problem states,
52 = 36 + 4x
16 = 4x
x = 4 (must be less than or equal to)
Let's take a look at the triangles ABC and DCB
1. angles : B=C=90° because they are right triangles (AB perpendicular to BC and DC perpendicular to BC)
2. AC=BD (given)
3. BC is in common (the two triangles have it, you can say it like BC=BC)
So we proved that by SAS(side angle side), the triangles are congruent ABC= DCB
Since the triangles are congrueny, all their sides are equal so we can say that AB=DC
Angle y° is 28°, as it is vertically opposite to the 28° counterpart.